* ThinPackData.from_file now works with resolve_ext_ref callback.
(Dave Borowitz)
+ * Provide strnlen() on mingw32 which doesn't have it. (Hans Kolek)
+
FEATURES
* Use slots for core objects to save up on memory. (Jelmer Vernooij)
* Allow overwriting id property of objects in test utils. (Dave Borowitz)
+ * Use real in-memory objects rather than stubs for server tests.
+ (Dave Borowitz)
+
API CHANGES
* ObjectStore.iter_tree_contents now walks contents in depth-first, sorted